Definition - What does Biodiesel mean?

Biodiesel is a petroleum "diesel fuel" product produced from vegetable oils, animal fats or recycled restaurant grease. Since it is prepared without wasting any non-renewable resources it is a renewable and biodegradable fuel. It performs similar to other diesel fuels; however, biodiesel burns completely and causes less pollution. Therefore, it is considered to be cleaner than diesel fuel.

Corrosionpedia explains Biodiesel

Biodiesel is a liquid fuel often referred to as B100 or neat biodiesel in its pure, unblended form. Like petroleum diesel, biodiesel is used to fuel compression-ignition engines.

Some characteristics of biodiesel:

Specific gravity 0.88
Kinematic viscosity at 40°C (104°F) 4.0 to 6.0
Cetane number 48 to 65
Higher heating value, Btu/gal Approx 127,960
Lower heating value, Btu/gal Approx 119,550
Density, lb/gal at 15.5°C (59.9°F) 7.3
Carbon, wt% 77
Hydrogen, wt% 12
Oxygen, by dif. wt% 11
Boiling point, °C 315-350
Flash point, °C 100-170
Sulfur, wt% 0.0 to 0.0015
Cloud point, °C -3 to 15
Pour point, °C -5 to 10

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